Patent Blue SLN in Early Ovarian Cancer Prospective Study (FIGO I-II) Evaluating Patent Blue SLN Mapping. Injection Into IP/UO Ligaments in Situ. Goals: Assess Feasibility and Accuracy vs Standard Lymphadenectomy to Minimize Surgical Morbidity

the standard of care in case of early ovarian cancer (stage I or II) is a complete surgery. This surgery includes : hysterectomy (remove of the uterus), bilateral salpingo-oophorectomy (remove of the adnexa), omentectomy (remove of the epiploon), bilateral pelvic lymphadenectomy (remove of pelvic lymph nodes) and para-aortic lymphadenectomy (remove of para-aortic lymph nodes). This procedure is diagnostic, curative and prognostic surgery. In fact, it allows us provider care giver to stratify the stage of the cancer, hence we give the appropriate adjuvant therapy. However, this surgery, especially the extended lymphadenectomy, is associated with some risks: lymphocele, vessel injury, blood loss, morbidity, long recovery period ... In order to reduce these risks, we propose a sentinel lymph node biopsy. This intervention allows us to detect first lymph node relay whether pelvic or para-aortic. In our study, we chose the patent blue dye as a tracer. This tracer is widely used in oncologic surgery (for example in breast cancer) and approved but not in ovarian cancer yet. During surgery for early stage ovarian cancer, we will inject the patent blue dye on both side of the ovarian tumor. Then, we will check for first colorful lymph node, in both pelvic and para-aortic regions. We will send these dissected lymph node to pathology for analysis. Finally, we will continue the procedure as the standard of care. Our objective is to compare the results between the sentinel lymph node and the complete lymphadenectomy and to study the technique of sentinel lymph node biopsy using the blue patent dye as tracer.

Sex

Female

Minimum age

18 Years

Inclusion Criteria:

* Age : aged 18 years-old or older
* Diagnosis: Suspected Ovarian cancer on MRI finding (O-RADs 4 or 5)
* FIGO stage: Stage I or II ( Based on MRI and scanner finding)
* Planned Procedure: Patients with planned for surgical complete stadification including pelvic and para-aortic lymphadenectomy
* Consent: Signing of the written informed consent after full information has been provided

Exclusion Criteria:

* Suspicious nodal involvement: Presence of suspicious lymph nodes on preoperative imaging (generally defined by a short-axis diameter ≥ 10 mm).
* Disease extension: Radiological or intraoperative evidence of extra-pelvic metastases or peritoneal carcinomatosis.
* Surgical history: History of lymphadenectomy, lymph node sampling, or major vascular surgery involving the aorta or the iliac vessels.
* History of radiotherapy: Patients who have previously undergone pelvic or abdominal radiotherapy.
* Allergies: Known allergy or adverse reaction to patent blue dyes.

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